Fig. 5

Relative expression levels of the whole set of the Vitis vinifera stilbene synthase genes (VvSTS) in the leaves of the nine grapevine genotypes of Fig. 1 collected up to 72 h after inoculation with P. viticola. The letter denoting the phylogenetic group to which each gene belongs is given in parentheses. For each gene, relative expression levels were calculated by setting a value of 1 for the lowest value among the nine genotypes in each of the five time points considered. Normalization and sample replication as in Fig. 3. For each gene, statistical evaluation of the differences among the nine grapevine genotypes and among the five sampling times is reported in Additional file 2: Table S6. Grapevine genotypes: CHA = Chasselas, ALE = Aleatico, CAN=Canaiolo nero, TRE = Trebbiano toscano, ROS = Rossetto, ROM = Romanesco, SYL = accession of V. vinifera subsp. sylvestris, ISA = Isabella, SOL = Solaris